* {
    /* 使元素的宽度和高度包括内边距和边框 */
    box-sizing: border-box;
    /* 变化时间 */
    transition: all .3s;
    scroll-behavior: smooth;
    word-wrap: break-word;
}

html {
    font-family: sans-serif;
}

body {
    margin: 0;
    padding: 0;
    top: 0;
    left: 0;
    right: 0;
    height: 100vh;
    color: #333;
    font-family: "microsoft yahei", "Helvetica Neue";
    font-size: 14px;
}

p {
    /* 左 右 下 */
    margin: 0 0 10px;
}

h1 {
    font-size: 2em;
    margin: .67em 0;
}

img {
    border: 0;
    max-width: 100%;
    height: auto;
}

i {
    font-style: normal;
}

.coverBox {
    width: 100%;
    height: 100%;
    /* 居中 */
    display: flex;
    align-items: center;
    justify-content: center;
}

